He is one of those zoom fishes, who don't know how to play (stations, If you will). He has Q, 5 or 2 there, and you won't get any more value by raising river. YOu could raise bigger that turn, though. Calling river is fine!

Could already just threw a raise right on the flop vs his play which is rather weak, with floating you will never even know where you stand on the turn. But otherwise I'd still raise bigger on the turn and can also raise thin on the river for value and planning to fold of course if he 3bets.